5-乙酰氧基甲基-2-呋喃羧酸 、 甲烷 在
乙酸乙酯 作用下,
以
乙酸乙酯 为溶剂,
反应 0.17h,
以to give the title acid as an oil (3.64g)的产率得到(2RS,5SR)-5-Acetoxymethyltetrahydrofuran-2-carboxylic acid
参考文献:
名称:
Cephaloporins and homologues, preparations and pharmaceutical
Cephalosporins and homologues, preparations and pharmaceutical
申请人:——
公开号:US06001997A1
公开(公告)日:1999-12-14
.beta.-Lactam antibiotics of formula (I) or a salt thereof, wherein R.sup.1 is hydrogen, methoxy or formamido; R.sup.2 is an acyl group; CO.sub.2 R.sup.3 is a carboxy group or a carboxylate anion, or R.sup.3 is a readily removable carboxy protecting group; R.sup.4 represents up to four substituents; X is S, SO, SO.sub.2, O or CH.sub.2 ; m is 1 or 2; and n is 0, useful in the treatment of bacterial infections. ##STR1##
Cephaloporins and homologues, preparations and pharmaceutical
申请人:Pzifer Inc.
公开号:US06020329A1
公开(公告)日:2000-02-01
.beta.-Lactam antibiotics of formula (I) or a salt thereof, wherein R.sup.1 is hydrogen, methoxy or formamido; R.sup.2 is an acy group; CO.sub.2 R.sup.3 is a carboxy group or a carboxylate anion, or R.sup.3 is a readily removable carboxy protecting group; R.sup.4 represents up to four substituents; X is S, SO, SO.sub.2, O or CH.sub.2 ; m is 1 or 2; and n is 0, useful in the treatment of bacterial infec ##STR1##
[EN] CEPHALOSPORINS AND HOMOLOGUES, PREPARATIONS AND PHARMACEUTICAL COMPOSITIONS
申请人:BEECHAM GROUP PLC
公开号:WO1992001696A1
公开(公告)日:1992-02-06
(EN) $g(b)-Lactam antibiotics of formula (I) or a salt thereof, wherein R1 is hydrogen, methoxy or formamido; R2 is an acyl group; CO2R3 is a carboxy group or a carboxylate anion, or R3 is a readily removable carboxy protecting group; R4 represents up to four substituents; X is S, SO, SO2, O or CH2; m is 1 or 2; and n is 0, useful in the treatment of bacterial infections in humans and animals.(FR) Antibiotiques de $g(b)-lactame correspondant à la formule (I) ou un de leurs sels. Dans la formule, R4 représente hydrogène, méthoxy ou formamido; R2 représente un groupe acyle; CO2R3 représente un groupe carboxy ou un anion de carboxylate, ou R3 représente un groupe de protection carboxy facilement éliminable; R4 représente jusqu'à quatre substituants; X représente S, SO, SO2, O ou CH2; m vaut 1 ou 2; et n vaut 0, efficaces dans le traitement d'infections bactériennes chez les humains et les animaux.